#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<string.h>
#include<assert.h>

size_t my_strlen(char* arr)
{
	int count = 0;
	while (*arr != '\0')
	{
		count++;
		arr++;
	}
	return count;
}


int main()
{
	char arr1[20] = { 0 };
	char arr2[] = "12324345346";
	size_t ret = my_strlen(arr2);
	printf("%u", ret);
	return 0;
}